Apparatus and method for adapting 2d and 3d stereoscopic video signal

An apparatus for adaptively converting two-dimensional stereoscopic video signals or three-dimensional stereoscopic video signals and a method thereof are provided to adaptively convert video contents to coincide with various use environments by using user characteristic and user terminal characteristic information. A video use environment information manager(107) collects user characteristic information describing user characteristic related to video signals from a user terminal and describes and manages the user characteristic information. A video adaptive converter(103) adaptively converts video signals to output two-dimensional stereoscopic video signals or three-dimensional stereoscopic video signals coinciding with video use environment information to the user terminal.